The explosion hazard sometimes becomes real for many reasons when working with tires unfortunately, and the results are never good. I was witness to an accident once where a tire installer forced a 16 inch truck tire on to a 16.5 inch rim and not
realizing his mistake. As he was inflating it, he removed the retaining nut from the tire machine. He was lucky, and lived.
I will never forget that day, and this thread reminded me of it. So many things can happen that we as humans don't think about. Very sorry to hear about your friends son Don. Be careful out there guys.